I don't think you'd know there was a hi-lo behind a Cummins. I started in a pop up and will not do that again. Granted mine was a tent pop up and a hi lo is much nicer, but the setup and difficult access on the road is a non-starter for me anymore. It's so nice when a kid needs to use the potty to just pull off on a wide spot and the rear door opens up right next to the bathroom. Nice for my wife and I too. Lunches on the road are much easier this way too. To be honest I think pop ups and ultralights are the junk of the RV world, and when the RV world is mostly junk to begin with you don't want to be on the bottom end of that spectrum.